diff --git a/partner_firstname/tests/__init__.py b/partner_firstname/tests/__init__.py
index 6ad0d4ec1..c2bee213c 100644
--- a/partner_firstname/tests/__init__.py
+++ b/partner_firstname/tests/__init__.py
@@ -37,4 +37,5 @@ from . import (
     test_name,
     test_onchange,
     test_order,
+    test_access_check,
 )
diff --git a/partner_firstname/tests/test_access_check.py b/partner_firstname/tests/test_access_check.py
new file mode 100644
index 000000000..ca390cc86
--- /dev/null
+++ b/partner_firstname/tests/test_access_check.py
@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+# Copyright 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openerp.tests.common import HttpCase, TransactionCase
+from openerp.exceptions import AccessError
+
+
+class TestAccessCheck(TransactionCase):
+    def setUp(self, *args, **kwargs):
+        super(TestAccessCheck, self).setUp(*args, **kwargs)
+
+        self.user_a = self.env['res.users'].create({
+            'name': u'User A',
+            'login': u'user_a',
+        })
+        self.user_b = self.env['res.users'].create({
+            'name': u'User B',
+            'login': u'user_b',
+        })
+
+    def test_same_name_write(self):
+        """Write only same name is allowed. Bug use case"""
+        partner = self.user_b.partner_id.sudo(user=self.user_a.id)
+        partner.write({'name': u'User B'})
+
+    def test_other_name_write(self):
+        """Write other name is not allowed. Normal case"""
+        with self.assertRaises(AccessError):
+            partner = self.user_b.partner_id.sudo(user=self.user_a.id)
+            partner.write({'name': u'User C'})
+
+    def test_other_fields_write(self):
+        """Write other fields is not allowed. Normal case"""
+        with self.assertRaises(AccessError):
+            partner = self.user_b.partner_id.sudo(user=self.user_a.id)
+            partner.write({'email': u't@e.com'})